Visual Studio 2019 not starting all defined startup projects

Adam-128244 1 Reputation point
2021-03-12T00:28:49.367+00:00

I have a Visual Studio 2019 solution which has about 10 projects. Most are libraries, but three of them are WPF applications. I have selected to debug each of the three WPF applications when I run the program. When I press the play button to launch and debug, about 50% of the time I do see the three applications launch. However, the other 50% only one or two of the applications start. I have not been able to narrow down any rhyme or reason yet and could use some help.

Here is what I have noticed.

  1. the three applications do appear in the task manager
  2. all the selected start applications appear in the debug->windows->processes
  3. when I click the break (or pause) button, I can't only double click on the debug->windows->processes process of the apps that appear to have started and display their respective window (WPF app)
  4. also when in break mode, I do not see any debug->windows->threads for the apps that do not visually appear

very strange! Has anyone else seen this? Any ideas on what I could look for next?

-- Adam

Windows Presentation Foundation
Windows Presentation Foundation
A part of the .NET Framework that provides a unified programming model for building line-of-business desktop applications on Windows.
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C#
C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
10,319 questions
Visual Studio Debugging
Visual Studio Debugging
Visual Studio: A family of Microsoft suites of integrated development tools for building applications for Windows, the web and mobile devices.Debugging: The act or process of detecting, locating, and correcting logical or syntactical errors in a program or malfunctions in hardware. In hardware contexts, the term troubleshoot is the term more frequently used, especially if the problem is major.
948 questions

2 answers

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  1. Dylan Zhu-MSFT 6,406 Reputation points
    2021-03-12T05:46:03.36+00:00

    Hi 46218126,

    You can try to delete the .vs folder next to sln file.

    If it doesn't work, I'm afraid that you need to repair your visual studio.

    Best Regards, Dylan

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  2. Mares, Jiri 0 Reputation points
    2023-06-01T09:11:34.29+00:00

    it helps just to "pause" the debug (break all) and then hit continue (a.k.a. play :)
    Sadly I do not have proper solution.
    I'm having this issue with both VS 2019 and VS 2022

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